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mpc8540_ads.c

/*
 * MPC8540ADS board specific routines
 *
 * Maintainer: Kumar Gala <galak@kernel.crashing.org>
 *
 * Copyright 2004 Freescale Semiconductor Inc.
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/reboot.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/serial.h>
#include <linux/tty.h>  /* for linux/serial_core.h */
#include <linux/serial_core.h>
#include <linux/initrd.h>
#include <linux/module.h>
#include <linux/fsl_devices.h>

#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/atomic.h>
#include <asm/time.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/open_pic.h>
#include <asm/bootinfo.h>
#include <asm/pci-bridge.h>
#include <asm/mpc85xx.h>
#include <asm/irq.h>
#include <asm/immap_85xx.h>
#include <asm/kgdb.h>
#include <asm/ppc_sys.h>
#include <mm/mmu_decl.h>

#include <syslib/ppc85xx_setup.h>

/* ************************************************************************
 *
 * Setup the architecture
 *
 */
static void __init
mpc8540ads_setup_arch(void)
{
      bd_t *binfo = (bd_t *) __res;
      unsigned int freq;
      struct gianfar_platform_data *pdata;
      struct gianfar_mdio_data *mdata;

      /* get the core frequency */
      freq = binfo->bi_intfreq;

      if (ppc_md.progress)
            ppc_md.progress("mpc8540ads_setup_arch()", 0);

      /* Set loops_per_jiffy to a half-way reasonable value,
         for use until calibrate_delay gets called. */
      loops_per_jiffy = freq / HZ;

#ifdef CONFIG_PCI
      /* setup PCI host bridges */
      mpc85xx_setup_hose();
#endif

#ifdef CONFIG_SERIAL_8250
      mpc85xx_early_serial_map();
#endif

#ifdef CONFIG_SERIAL_TEXT_DEBUG
      /* Invalidate the entry we stole earlier the serial ports
       * should be properly mapped */
      invalidate_tlbcam_entry(num_tlbcam_entries - 1);
#endif

      /* setup the board related info for the MDIO bus */
      mdata = (struct gianfar_mdio_data *) ppc_sys_get_pdata(MPC85xx_MDIO);

      mdata->irq[0] = MPC85xx_IRQ_EXT5;
      mdata->irq[1] = MPC85xx_IRQ_EXT5;
      mdata->irq[2] = PHY_POLL;
      mdata->irq[3] = MPC85xx_IRQ_EXT5;
      mdata->irq[31] = PHY_POLL;

      /* setup the board related information for the enet controllers */
      pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC1);
      if (pdata) {
            pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
            pdata->bus_id = 0;
            pdata->phy_id = 0;
            memcpy(pdata->mac_addr, binfo->bi_enetaddr, 6);
      }

      pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC2);
      if (pdata) {
            pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
            pdata->bus_id = 0;
            pdata->phy_id = 1;
            memcpy(pdata->mac_addr, binfo->bi_enet1addr, 6);
      }

      pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_FEC);
      if (pdata) {
            pdata->board_flags = 0;
            pdata->bus_id = 0;
            pdata->phy_id = 3;
            memcpy(pdata->mac_addr, binfo->bi_enet2addr, 6);
      }

#ifdef CONFIG_BLK_DEV_INITRD
      if (initrd_start)
            ROOT_DEV = Root_RAM0;
      else
#endif
#ifdef  CONFIG_ROOT_NFS
            ROOT_DEV = Root_NFS;
#else
            ROOT_DEV = Root_HDA1;
#endif
}

/* ************************************************************************ */
void __init
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
            unsigned long r6, unsigned long r7)
{
      /* parse_bootinfo must always be called first */
      parse_bootinfo(find_bootinfo());

      /*
       * If we were passed in a board information, copy it into the
       * residual data area.
       */
      if (r3) {
            memcpy((void *) __res, (void *) (r3 + KERNELBASE),
                   sizeof (bd_t));
      }
#ifdef CONFIG_SERIAL_TEXT_DEBUG
      {
            bd_t *binfo = (bd_t *) __res;
            struct uart_port p;

            /* Use the last TLB entry to map CCSRBAR to allow access to DUART regs */
            settlbcam(num_tlbcam_entries - 1, binfo->bi_immr_base,
                    binfo->bi_immr_base, MPC85xx_CCSRBAR_SIZE, _PAGE_IO, 0);

            memset(&p, 0, sizeof (p));
            p.iotype = UPIO_MEM;
            p.membase = (void *) binfo->bi_immr_base + MPC85xx_UART0_OFFSET;
            p.uartclk = binfo->bi_busfreq;

            gen550_init(0, &p);

            memset(&p, 0, sizeof (p));
            p.iotype = UPIO_MEM;
            p.membase = (void *) binfo->bi_immr_base + MPC85xx_UART1_OFFSET;
            p.uartclk = binfo->bi_busfreq;

            gen550_init(1, &p);
      }
#endif

#if defined(CONFIG_BLK_DEV_INITRD)
      /*
       * If the init RAM disk has been configured in, and there's a valid
       * starting address for it, set it up.
       */
      if (r4) {
            initrd_start = r4 + KERNELBASE;
            initrd_end = r5 + KERNELBASE;
      }
#endif                        /* CONFIG_BLK_DEV_INITRD */

      /* Copy the kernel command line arguments to a safe place. */

      if (r6) {
            *(char *) (r7 + KERNELBASE) = 0;
            strcpy(cmd_line, (char *) (r6 + KERNELBASE));
      }

      identify_ppc_sys_by_id(mfspr(SPRN_SVR));

      /* setup the PowerPC module struct */
      ppc_md.setup_arch = mpc8540ads_setup_arch;
      ppc_md.show_cpuinfo = mpc85xx_ads_show_cpuinfo;

      ppc_md.init_IRQ = mpc85xx_ads_init_IRQ;
      ppc_md.get_irq = openpic_get_irq;

      ppc_md.restart = mpc85xx_restart;
      ppc_md.power_off = mpc85xx_power_off;
      ppc_md.halt = mpc85xx_halt;

      ppc_md.find_end_of_memory = mpc85xx_find_end_of_memory;

      ppc_md.time_init = NULL;
      ppc_md.set_rtc_time = NULL;
      ppc_md.get_rtc_time = NULL;
      ppc_md.calibrate_decr = mpc85xx_calibrate_decr;

#if defined(CONFIG_SERIAL_8250) && defined(CONFIG_SERIAL_TEXT_DEBUG)
      ppc_md.progress = gen550_progress;
#endif      /* CONFIG_SERIAL_8250 && CONFIG_SERIAL_TEXT_DEBUG */
#if defined(CONFIG_SERIAL_8250) && defined(CONFIG_KGDB)
      ppc_md.early_serial_map = mpc85xx_early_serial_map;
#endif      /* CONFIG_SERIAL_8250 && CONFIG_KGDB */

      if (ppc_md.progress)
            ppc_md.progress("mpc8540ads_init(): exit", 0);

      return;
}

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